I have replace the rotor, stator and rectifier, still not charging battery. Continuity on stator and rotor is good. Cannot get any AC voltage out of stator at 5000 RPM. I have tried 2 new stators and 2 new rotors, still nothing. I replace the brushes when I first replaced the stator. Don't know where to turn.

You could just run some new wires to replace the yellow ones. I didn't notice the year in your post but generally the stator puts out 3 AC signals on 3 yellow wires. IIRC you need silicone jacket wires and stake-ons/crimp on connectors to make the connections to the current devices(soldering isn't a bad option either, and using shrink tube and/or splicing tape). There is wire rated to be out in the sun. I'm not sure if bikes have sun rated wiring but I'd try to put that in. If there is a cheap harness locally and you are diligent with the swap it should be a bit easier though.

I really appreciate all the help, because I am about lost with this issue. Like I said before, I have used 2 different (new) stators, 2 different (new) rotors, 2 different (new) rectifiers, 2 different (new) batteries and replaced the brushes. I have checked the continuity on the rotor and stator, all good. From what I have read, I should be getting 50 or so AC volts through the 3 yellow leads coming from the stator at 5000 RPMs. I'm not getting shit. It's just a rotor spinning inside the stator, connected by the brushes. They are all new yet I am not getting anything out of the stator. Could this be a ground issue? I have also read a lot about the main wiring harness issues. I am prepared to change the wiring harness, but I would like to be reasonably certain this would correct the issue. Even though when testing the stator, straight off of the stator wiring harness, and getting basically no AC voltage, could it still be the main wiring harness? I mean, testing that way doesn't use the main wiring harness at all. That's why I am wondering if it could be a ground issue being caused by the main wiring harness.

I did some further testing. It is my understanding about how this charging system works, that 12V DC is sent to the rotor to generate the AC voltage coming out of the stator. From what I can tell, there is almost 12V DC coming out of the rectifier (checking voltage on the black and white wires where the rectifier connects to the stator). If I am not correct in my thinking about how this charging system works, please set me straight. Does it make any difference which wire is connected to which brush? Just don't really know where to go from here. My thinking is, if I am getting the DC current out of the rectifier to go to the brushes then the problem is not in the main wiring harness.

I checked the voltage at the brushes. I am getting 12 VDC to the brushes. I can tell that the brushes are making good contact with the rotor.So can anyone tell me why I am getting 0 VAC out of the stator? Again, rotor, stator, and rectifier are all new.

I wish I could help. By your description, you should be charging. Have you gone through all the electrical connections in your wiring harness and cleaned them? Checked for continuity in all your wires? Made sure all your grounds are...grounded?